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Power grid free text knowledge extraction method
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A knowledge extraction and power grid technology, applied in the information field, can solve the problems of insufficient utilization of power grid free text data, low accuracy of power grid free text knowledge extraction, and insufficient coverage
Inactive Publication Date: 2020-05-19
XI AN JIAOTONG UNIV +1
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[0005] The technical problem to be solved by the present invention is to provide a method for extracting power grid free text knowledge to solve the problem of low accuracy and insufficient coverage of power grid free text knowledge, so that the power grid free text data cannot The problem of being fully utilized and giving full play to its value is solved, and the accuracy and coverage of knowledge extraction in the power grid field are improved
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Embodiment 1
[0048] A kind of grid free text knowledge extraction method based on semantic annotation in the present embodiment, comprises the following steps:
[0049] Step 1. Combining the power grid business knowledge, build a professional dictionary in the power grid field, and mark the professional vocabulary with special part of speech and word frequency;
[0050] Specifically, this step is to collect professional terms in the power grid field, and mark the professional terms with nz, and each line is expressed in the form of "technical term nz word frequency"; specifically, for all characters in each line, uniformly use "technical term nz word frequency "Form said.
[0051] Step 2, combined with the professional dictionary built in step 1, perform text data preprocessing operations such as word segmentation and part-of-speech tagging on the collected free text data of the power grid;
[0052] In this step, combined with the professional dictionary constructed in step 1, preprocessi...
Embodiment 2
[0065] see Figure 2 ~ Figure 4 , a method for extracting power grid free text knowledge based on semantic annotation, including the following steps:
[0066] Step 1. Combining the power grid business knowledge, build a professional dictionary in the power grid field, and mark the professional vocabulary with special part of speech and word frequency;
[0067] Among them, the power grid field professional dictionary mentioned in this plan refers to a collection of terms unique to the power grid field, reflecting the core knowledge in the power grid field.
[0068] Specifically, the professional vocabulary is marked with a special part of speech nz and the corresponding word frequency is given, and each line in the professional dictionary in the power grid field is marked with "special term nz word frequency", such as figure 2 shown.
[0069] Step 2, combined with the professional dictionary constructed in step 1, perform text data preprocessing operations such as word segme...
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Abstract
The invention discloses a power grid free text knowledge extraction method. The method comprises the steps of collecting power grid free text data; preprocessing the collected free text data; carryingout dependency syntactic analysis on the preprocessed power grid free text data to obtain a dependency relationship; performing entity relationship extraction on the obtained dependency relationshipin combination with the marked professional terms to obtain an initial power grid entity relationship; if the initial power grid entity relationship is not repeated, obtaining a final power grid entity relationship; and converting the obtained final power grid entity relationship into a knowledge graph and presenting the knowledge graph. According to the method, the problems that the power grid free text knowledge extraction accuracy is low, the coverage area is insufficient, the power grid free text data cannot be fully utilized, and the value of the power grid free text data cannot be exerted are solved, and the power grid domain knowledge extraction accuracy and coverage area are improved.
Description
technical field [0001] The invention belongs to the field of information technology, and in particular relates to a method for extracting free text knowledge of a power grid. Background technique [0002] With the rapid development of the information construction of power grid companies, the data accumulated in the information system has increased, including not only structured data, but also unstructured text data. At present, most of the company's exploration and mining of data value is oriented to structured data, and the use of unstructured free text data is not sufficient, and the knowledge contained in the power grid free text has not been fully extracted. The knowledge extraction of power grid free text has become an inevitable requirement for the company's development, and it has become one of the important tasks to support the company's lean management and scientific decision-making. [0003] With the continuous development of natural languageprocessing technology...
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